Created attachment 115609 [details] File in which trend lines are failing in strange ways As per example file. Can not find steps to reproduce outside of the example file provided. Trend lines calculate r^2 and the equation, but do not visually appear... sometimes. Reproduced on Arch Linux and Windows with the example file. Unable to reproduce in a new file.
Hi @Josh, I think there is not a bug, the issue is the data range include first row without marked first row as label. Works for me beginning the data range in row two or marking first row as label. Please if you are not agree reopen it.
That is indeed the problem. The documentation seems scarce on this issue, and should perhaps be addressed. Thank you for your time :)